Do not use Boost mode on small batteries (motorcycle, lawnmower) unless specified. Check your battery’s max amperage.
– If the charger is hot, unplug it for 30 minutes. The red light may flash rapidly. This is normal in summer. selmar-turbo-4-battery-charger-instructions
The is a heavy-duty, professional-grade battery charger designed primarily for automotive and marine applications. Produced by Selmar S.r.l. (an Italian manufacturer known for battery formation and charging systems), the "Turbo 4" is an older, transformer-based robust unit. Unlike modern "smart" chargers that rely solely on microprocessors, the Turbo 4 utilizes a manual selector switch for voltage and amperage, offering high durability and the ability to recover deeply discharged or sulfated batteries that modern electronic chargers might reject. Do not use Boost mode on small batteries